S-index (h-mixed synthetic index)
The S-index (Ye 2010) is an h-mixed synthetic index which combines multiple metrics together into a single value. It is calculated as
$$S=100\log_{10}\left(h \times C/P\right),$$where C/P is the mean number of citations per publication.
History
| Year | S |
|---|---|
| 1997 | -47.7121 |
| 1998 | 75.0123 |
| 1999 | 116.6331 |
| 2000 | 147.7121 |
| 2001 | 168.4247 |
| 2002 | 191.0915 |
| 2003 | 218.7087 |
| 2004 | 242.2284 |
| 2005 | 257.5650 |
| 2006 | 277.9115 |
| 2007 | 294.1753 |
| 2008 | 306.2582 |
| 2009 | 316.6331 |
| 2010 | 321.6192 |
| 2011 | 331.5535 |
| 2012 | 343.4751 |
| 2013 | 346.8533 |
| 2014 | 352.0066 |
| 2015 | 356.0540 |
| 2016 | 359.0863 |
| 2017 | 364.4113 |
| 2018 | 364.8058 |
| 2019 | 367.3174 |
| 2020 | 370.8317 |
| 2021 | 373.8369 |
| 2022 | 376.0718 |
| 2023 | 378.8546 |
| 2024 | 379.4610 |
References
- Ye, F.Y. (2010) Two H-mixed synthetic indices for the assessment of research performance. Journal of Library and Information Studies 8:1–9.